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PD.121
Mid Range Driver
- Heavy-duty cast aluminium chassis for increased rigidity
- Mid range transducer suitable for either direct radiating or horn loaded applications
- Smooth response for easy integration across vocal frequency band
Diameter
12" / 300 mm
Coil Diameter
2.5" / 63.5 mm
Power Rating
300 w (A.E.S.)
Frequency Range
100 Hz - 6 kHz
Sensitivity
99 dB
Xmax
2.7 mm
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General Specifications
| Type | Mid Range Driver |
| Available Impedance | 4 Ω/ 8 Ω/ 16 Ω |
| Nominal Diameter | 12" / 300 mm |
| Voice Coil Diameter | 2.5" / 63.5 mm |
| Peak Power (6 dB Crest Factor) * | 1200 w (A.E.S.) |
| Power Rating 1 2 * | 300 w (A.E.S.) |
| Sensitivity (1W/ 1m) * | 99 dB |
| Frequency Range | 100 Hz - 6 kHz |
| Resonance | 53.27 Hz |
| Voice Coil Winding Depth | 12 mm / 0.47" |
| Recommended Enclosure Volume | 10 - 60 Litres |
| Flux Density | 1.5 Tesla |
| Magnet Material | Ceramic |
| Magnet Gap Depth | 9 mm / 0.35" |
| Former Material | Glass Fibre |
| Dust Dome Material | Paper |
| Voice Coil Material | Copper |
| Cone Material | Paper |
| Suspension Material | Fabric |
| Surround Material | Fabric |
Thiele Small Parameters
| Fs | 53.27 Hz |
| Re | 5.93 Ω |
| Qms | 14.66 |
| Qes | 0.23 |
| Qts | 0.23 |
| Le (@ 1 kHz) | 0.42 mh |
| Vas | 66.58 litres |
| Mms | 65.37 g |
| Sd | 530.93 cm2 |
| Cms | 168.33 µm/N |
| BL | 21.46 T/m |
| Xmax | 2.7 mm |
| Vd | 0.143 litres |
| Ref. Efficiency | 5.10% |
| EBP | 231.60 Hz |
Dimensions & Mounting
| Overall Diameter | 330 mm |
| Width Across Flats | 320.5 mm |
| Flange Height | 10 mm |
| Depth (Excl. Flange) | 115 mm |
| Magnet Diameter | 200 mm |
| Chassis Shoulder Diameter | 282 mm |
| Outer Bolt Circle | 6 * M6 on 318mm PCD |
| Inner Bolt Circle | 8 * M6 on 293mm PCD |
Shipping Information
| Nett Weight | 9.2 Kg / 20.28 lb. |
| Shipping Weight | 10 Kg / 22.05 lb. |
Notes
*1 Power compression is the reduction of sensitivity at the specified power. Higher power ratings do not necessarily give a proportionate increase in SPL therefore the maximum SPL of the driver may significantly exceed that of other manufacturers with high power ratings.
1. AES Standard (60 to 600 Hz) Program 600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 300 Watt preconditioning period.
Please note that frequency response measurements are supplied for comparison purposes only and are not a measure of the low frequency performance which may be achievable in a fully optimised system.
1. AES Standard (60 to 600 Hz) Program 600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 300 Watt preconditioning period.
Please note that frequency response measurements are supplied for comparison purposes only and are not a measure of the low frequency performance which may be achievable in a fully optimised system.
Frequency Response & Impedance
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